OSSAMU OKAZAKI
Projetos de Pesquisa
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11 resultados
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bookPart Prótese Metálica Autoexpansível no Tratamento de Fístulas e/ou Discências após Cirurgia Bariátrica(2020) PONTE NETO, Alberto Machado; OKAZAKI, Ossamu- Endoscopic Treatment of Weight Regain Following Roux-en-Y Gastric Bypass: a Systematic Review and Meta-analysis(2018) BRUNALDI, Vitor Ottoboni; JIRAPINYO, Pichamol; MOURA, Diogo Turiani H. de; OKAZAKI, Ossamu; BERNARDO, Wanderley M.; GALVO NETO, Manoel; CAMPOS, Josemberg Marins; SANTO, Marco Aurelio; MOURA, Eduardo G. H. deRoux-en-Y gastric bypass (RYGB) is the most commonly performed bariatric procedure. Despite its high efficacy, some patients regain part of their lost weight. Several endoscopic therapies have been introduced as alternatives to treat weight regain, but most of the articles are relatively small with unclear long-term data. To systematically assess the efficacy of endoscopic therapies for weight regain after RYGB. We searched MEDLINE, EMBASE, Scopus, Web of Science, Cochrane, OVID, CINAHL/EBSCo, LILACS/Bireme, and gray literature. Primary outcomes were absolute weight loss (AWL), excess weight loss (EWL), and total body weight loss (TBWL). Thirty-two studies were included in qualitative analysis. Twenty-six described full-thickness (FT) endoscopic suturing and pooled AWL, EWL, and TBWL at 3 months were 8.5 +/- 2.9 kg, 21.6 +/- 9.3%, and 7.3 +/- 2.6%, respectively. At 6 months, they were 8.6 +/- 3.5 kg, 23.7 +/- 12.3%, and 8.0 +/- 3.9%, respectively. At 12 months, they were 7.63 +/- 4.3 kg, 16.9 +/- 11.1%, and 6.6 +/- 5.0%, respectively. Subgroup analysis showed that all outcomes were significantly higher in the group with FT suturing combined with argon plasma coagulation (APC) (p < 0.0001). Meta-analysis included 15 FT studies and showed greater results. Three studies described superficial-thickness suturing with pooled AWL of 3.0 +/- 3.8, 4.4 +/- 0.07, and 3.7 +/- 7.4 kg at 3, 6, and 12 months, respectively. Two articles described APC alone with mean AWL of 15.4 +/- 2.0 and 15.4 +/- 9.1 kg at 3 and 6 months, respectively. Full-thickness suturing is effective at treating weight regain after RYGB. Performing APC prior to suturing seems to result in greater weight loss. Head-to-head studies are needed to confirm our results. Few studies adequately assess effectiveness of other endoscopic techniques.
- Efficacy and Safety of Stents in the Treatment of Fistula After Bariatric Surgery: a Systematic Review and Meta-analysis(2018) OKAZAKI, Ossamu; BERNARDO, Wanderley M.; BRUNALDI, Vitor O.; CLEMENTE JUNIOR, Cesar C. de; MINATA, Mauricio K.; MOURA, Diogo T. H. de; SOUZA, Thiago F. de; CAMPOS, Josemberg Marins; SANTO, Marco Aurelio; MOURA, Eduardo G. H. deFistula development is a serious complication after bariatric surgery. We performed a systematic review and meta-analysis to assess the efficacy of fistula closure and complications associated with endoscopic stent treatment of fistulas, developed after bariatric surgeries, particularly Roux-en-Y gastric bypass (RYGB) and gastric sleeve (GS). Studies involving patients with fistula after RYGB or GS and those who received stent treatment only were selected. The analyzed outcomes were overall success rate of fistula closure, mean number of stents per patient, mean stent dwelling time, and procedure-associated complications. Current evidence from identified studies demonstrates that, in selected patients, endoscopic stent treatment of fistulas after GS or RYGB can be safe and effective.
- Two-step ESD: an option for en-bloc resection of extensive colorectal laterally spreading tumors(2019) KAWAGUTI, Fabio S.; OKAZAKI, Ossamu; MIYAJIMA, Nelson T.; SEGATELI, Vanderlei; MARQUES, Carlos F. S.; NAHAS, Caio S. R.; MARTINS, Bruno C.; NAHAS, Sergio C.; JUNIOR, Ulysses R.; FILHO, Fauze M.Background and study aims Endoscopic submucosal dissection (ESD) is considered feasible and safe for treatment of colorectal laterally spreading tumors (LST), However it remains a challenge in case of extensive lesions even for experts. This study aimed to describe a new method to facilitate ESD of extensive colorectal LSTs. Between July 2010 and January 2018, 140 patients underwent ESD for colorectal LSTs. Four of them were submitted to two-step ESD and were included in this retrospective study. The submucosal dissection of lesions larger than 12 cm started and continued until the medical team decided to pause the procedure and continue it in a second step. The second procedure was performed 2 days after to finish the en-bloc resection.Three patients were male, with mean age of 67.2y (+/- 2.2). All lesions were located in the rectum, with a mean size of 153.7 mm (+/- 33.8). En-bloc and curative resection were successfully achieved in all cases. Mean duration of the first step of the procedure was 255 minutes (+/- 61.8), and mean duration of the second step was 205 minutes (+/- 205). Overall mean duration of both steps was 460 minutes (+/- 168). Mean dissected area in the first step of the procedure was approximately 55 % of the lesion. No adverse events were observed. In conclusion, our results suggest that performing ESD in two steps could be a feasible and safe option for exceptional cases in which is not possible to finish the procedure in one step, avoiding the morbidity of surgical treatment.
conferenceObject Systematic Review and Meta-Analysis of the Endoscopic Treatment for Weight Regain Following Roux-En-Y Gastric Bypass and the Role of Argon Plasma Coagulation Prior to Endoscopic Suture(2017) BRUNALDI, Vitor O.; BERNARDO, Wanderlei M.; OKAZAKI, Ossamu; MARINHO, Fabio R.; MOURA, Diogo T. de; RICCIOPPO, Daniel; SANTO, Marco Aurelio; GALVAO NETO, Manoel; MOURA, Eduardo G. de- ENDOSCOPIC SUBMUCOSAL DISSECTION (ESD) VERSUS TRANSANAL ENDOSCOPIC MICROSURGERY (TEM) FOR THE TREATMENT OF EARLY RECTAL CANCER: COMPARISON OF LONG TERM OUTCOMES(2019) KAWAGUTI, Fabio S.; KIMURA, Cintia Mayumi S.; MARQUES, Carlos F.; NAHAS, Caio Sergio R.; SEGATELI, Vanderlei; MARTINS, Bruno; OKAZAKI, Ossamu; SAFATLE-RIBEIRO, Adriana V.; RIBEIRO, Ulysses; NAHAS, Sergio C.; MALUF-FILHO, Fauze
- Stent migration requiring surgical removal: a serious adverse event after bariatric megastent placement(2018) MADRUGA NETO, Antonio C.; BRUNALDI, Vitor O.; OKAZAKI, Ossamu; SANTO FILHO, Marco A.; MIRANDA NETO, Antonio A.; ANAPAZ, Vera L.; MOURA, Eduardo G. H. de
conferenceObject The Use of Stents for Treatment of Post-Bariatric Fistula: Systematic Review and Metanaysis(2017) OKAZAKI, Ossamu; BRUNALDI, Vitor O.; MOURA, Diogo T. de; SOUZA, Thiago F. de; MESTIERI, Luiz H.; SANTO, Marco Aurelio; MOURA, Eduardo G. de- THE ROLE OF MAGNIFICATION CHROMOENDOSCOPY IN THE MANAGEMENT OF COLORECTAL NEOPLASTIC LESIONS SUSPICIOUS FOR SUBMUCOSAL INVASION(2019) KAWAGUTI, Fabio S.; FRANCO, Matheus C.; SEGATELI, Vanderlei; MARTINS, Bruno; OKAZAKI, Ossamu; MARQUES, Carlos F.; NAHAS, Caio Sergio R.; PINTO, Rodrigo A.; SAFATLE-RIBEIRO, Adriana V.; RIBEIRO, Ulysses; NAHAS, Sergio C.; MALUF-FILHO, Fauze
bookPart Tratamento Endoscópico de Fístulas Após Cirurgia Bariátrica(2017) OKAZAKI, Ossamu; MINATA, Mauricio Kazuyoshi; TOMA, Kengo; MESTIERI, Luiz Henrique Mazzonetto; MOURA, Eduardo Guimarães Hourneaux de